// ========================================================================= //

// includes
#include "stdio.h"
#include "stdlib.h"
#include "time.h"
#include "string.h"
#include "limits.h"
#include "float.h"



#define JOTAI_NUM_RANDS_ 25

const unsigned rand_primes[JOTAI_NUM_RANDS_] = {179, 103, 479, 647, 229, 37, 271, 557, 263, 607, 18743, 50359, 21929, 48757, 98179, 12907, 52937, 64579, 49957, 52567, 507163, 149939, 412157, 680861, 757751};

int next_i() {
  int counter = 0;
  return rand_primes[(++counter)%JOTAI_NUM_RANDS_];
}

float next_f() {
  int counter = 0;
  return rand_primes[(++counter)%JOTAI_NUM_RANDS_] / 757751.0F;
} 


// Usage menu
void usage() {
    printf("%s", "Usage:\n\
    prog [ARGS]\n\
\nARGS:\n\
       0            big-arr\n\
       1            big-arr-10x\n\
       2            empty\n\
\n\
");

}


// ------------------------------------------------------------------------- //

#define NULL ((void*)0)
typedef unsigned long size_t;  // Customize by platform.
typedef long intptr_t; typedef unsigned long uintptr_t;
typedef long scalar_t__;  // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */
typedef  int u_char ;
struct tcphdr {int th_flags; } ;
struct ip6_fw {int fw_ipflg; int fw_tcpf; int fw_tcpnf; } ;

/* Variables and functions */
 int IPV6_FW_IF_TCPEST ; 
 int IPV6_FW_TCPF_ACK ; 
 int IPV6_FW_TCPF_RST ; 
 int IPV6_FW_TCPF_SYN ; 

__attribute__((used)) static int
tcp6flg_match(struct tcphdr *tcp6, struct ip6_fw *f)
{
	u_char		flg_set, flg_clr;
	
	/*
	 * If an established connection is required, reject packets that
	 * have only SYN of RST|ACK|SYN set.  Otherwise, fall through to
	 * other flag requirements.
	 */
	if ((f->fw_ipflg & IPV6_FW_IF_TCPEST) &&
	    ((tcp6->th_flags & (IPV6_FW_TCPF_RST | IPV6_FW_TCPF_ACK |
	    IPV6_FW_TCPF_SYN)) == IPV6_FW_TCPF_SYN))
		return 0;

	flg_set = tcp6->th_flags & f->fw_tcpf;
	flg_clr = tcp6->th_flags & f->fw_tcpnf;

	if (flg_set != f->fw_tcpf)
		return 0;
	if (flg_clr)
		return 0;

	return 1;
}

// ------------------------------------------------------------------------- //

int main(int argc, char *argv[]) {

    if (argc != 2) {
        usage();
        return 1;
    }

    int opt = atoi(argv[1]);
    switch(opt) {


    // big-arr
    case 0:
    {
          // static_instructions_O0 : 30
          // dynamic_instructions_O0 : 30
          // ------------------------------- 
          // static_instructions_O1 : 16
          // dynamic_instructions_O1 : 16
          // ------------------------------- 
          // static_instructions_O2 : 16
          // dynamic_instructions_O2 : 16
          // ------------------------------- 
          // static_instructions_O3 : 16
          // dynamic_instructions_O3 : 16
          // ------------------------------- 
          // static_instructions_Ofast : 16
          // dynamic_instructions_Ofast : 16
          // ------------------------------- 
          // static_instructions_Os : 17
          // dynamic_instructions_Os : 17
          // ------------------------------- 
          // static_instructions_Oz : 17
          // dynamic_instructions_Oz : 17
          // ------------------------------- 

          int _len_tcp60 = 65025;
          struct tcphdr * tcp6 = (struct tcphdr *) malloc(_len_tcp60*sizeof(struct tcphdr));
          for(int _i0 = 0; _i0 < _len_tcp60; _i0++) {
              tcp6[_i0].th_flags = ((-2 * (next_i()%2)) + 1) * next_i();
        
          }
        
          int _len_f0 = 65025;
          struct ip6_fw * f = (struct ip6_fw *) malloc(_len_f0*sizeof(struct ip6_fw));
          for(int _i0 = 0; _i0 < _len_f0; _i0++) {
              f[_i0].fw_ipflg = ((-2 * (next_i()%2)) + 1) * next_i();
          f[_i0].fw_tcpf = ((-2 * (next_i()%2)) + 1) * next_i();
          f[_i0].fw_tcpnf = ((-2 * (next_i()%2)) + 1) * next_i();
        
          }
        
          int benchRet = tcp6flg_match(tcp6,f);
          printf("%d\n", benchRet); 
          free(tcp6);
          free(f);
        
        break;
    }


    // big-arr-10x
    case 1:
    {
          // static_instructions_O0 : 30
          // dynamic_instructions_O0 : 30
          // ------------------------------- 
          // static_instructions_O1 : 16
          // dynamic_instructions_O1 : 16
          // ------------------------------- 
          // static_instructions_O2 : 16
          // dynamic_instructions_O2 : 16
          // ------------------------------- 
          // static_instructions_O3 : 16
          // dynamic_instructions_O3 : 16
          // ------------------------------- 
          // static_instructions_Ofast : 16
          // dynamic_instructions_Ofast : 16
          // ------------------------------- 
          // static_instructions_Os : 17
          // dynamic_instructions_Os : 17
          // ------------------------------- 
          // static_instructions_Oz : 17
          // dynamic_instructions_Oz : 17
          // ------------------------------- 

          int _len_tcp60 = 100;
          struct tcphdr * tcp6 = (struct tcphdr *) malloc(_len_tcp60*sizeof(struct tcphdr));
          for(int _i0 = 0; _i0 < _len_tcp60; _i0++) {
              tcp6[_i0].th_flags = ((-2 * (next_i()%2)) + 1) * next_i();
        
          }
        
          int _len_f0 = 100;
          struct ip6_fw * f = (struct ip6_fw *) malloc(_len_f0*sizeof(struct ip6_fw));
          for(int _i0 = 0; _i0 < _len_f0; _i0++) {
              f[_i0].fw_ipflg = ((-2 * (next_i()%2)) + 1) * next_i();
          f[_i0].fw_tcpf = ((-2 * (next_i()%2)) + 1) * next_i();
          f[_i0].fw_tcpnf = ((-2 * (next_i()%2)) + 1) * next_i();
        
          }
        
          int benchRet = tcp6flg_match(tcp6,f);
          printf("%d\n", benchRet); 
          free(tcp6);
          free(f);
        
        break;
    }


    // empty
    case 2:
    {
          // static_instructions_O0 : 30
          // dynamic_instructions_O0 : 30
          // ------------------------------- 
          // static_instructions_O1 : 16
          // dynamic_instructions_O1 : 16
          // ------------------------------- 
          // static_instructions_O2 : 16
          // dynamic_instructions_O2 : 16
          // ------------------------------- 
          // static_instructions_O3 : 16
          // dynamic_instructions_O3 : 16
          // ------------------------------- 
          // static_instructions_Ofast : 16
          // dynamic_instructions_Ofast : 16
          // ------------------------------- 
          // static_instructions_Os : 17
          // dynamic_instructions_Os : 17
          // ------------------------------- 
          // static_instructions_Oz : 17
          // dynamic_instructions_Oz : 17
          // ------------------------------- 

          int _len_tcp60 = 1;
          struct tcphdr * tcp6 = (struct tcphdr *) malloc(_len_tcp60*sizeof(struct tcphdr));
          for(int _i0 = 0; _i0 < _len_tcp60; _i0++) {
              tcp6[_i0].th_flags = ((-2 * (next_i()%2)) + 1) * next_i();
        
          }
        
          int _len_f0 = 1;
          struct ip6_fw * f = (struct ip6_fw *) malloc(_len_f0*sizeof(struct ip6_fw));
          for(int _i0 = 0; _i0 < _len_f0; _i0++) {
              f[_i0].fw_ipflg = ((-2 * (next_i()%2)) + 1) * next_i();
          f[_i0].fw_tcpf = ((-2 * (next_i()%2)) + 1) * next_i();
          f[_i0].fw_tcpnf = ((-2 * (next_i()%2)) + 1) * next_i();
        
          }
        
          int benchRet = tcp6flg_match(tcp6,f);
          printf("%d\n", benchRet); 
          free(tcp6);
          free(f);
        
        break;
    }

    default:
        usage();
        break;

    }

    return 0;
}
